Textured Black Paint: How do I do it?

I'm not sure where to post this question, and I've looked everywhere. I'm refurbishing an amplifier. It's an old B&K with a steel case painted with a textured black paint. Many manufacturers use a similar paint - including REL, Green Mountain Audio (on the Europa), B&K, Parasound, etc. I'm not sure what it's called, but I think Rel calls it "Britix Black".

My question is how can I duplicate it? I called B&K - they just outsource the chassis work, don't know how it's done. I have the spray equipment, but can't find any pre-mixed paint that results in this irregular Texture. Rustoleum sells a texture paint, but it's a finer, more consistent texture than this, and only available in the spray can, so I can't fiddle with the pressure/flow to "coursen it up". I assume there is a chemical that will cause "curdling" of the paint when mixed in.

Can someone help me? thanks in advance!
Don't know where you are located, but you could take the top of the case to an O'Reilly Automotive or to any auto supply shop that mixes their own paint, they will be able to duplicate it and put it into spray cans for you. What you have is generally referred to as 'crinkle finish' paint.
What about mixing sand in the paint? I dont know how it will look but might be similar to your goal.
If I'm not mistaken..Rust-O-Leum has textured paint finish in a can. At least I saw an ad for it. Its certainly worth a trip to Lowes or Home Depot.
I just bought some black textured Rust-Oleum paint at Home Depot. I have also bought Black "Crinkle" paint at another paint store, had more texture than the Rust-Oleum. It is out there, you may need to do some searching though.

there is also a paint called FLECSTONE, wich has a 3d finish
Try this:

Those textured finishes you see are provided by powder-coaters. I have gotten a few things done by them over the years. Look in your phone book under powder-coaters, or paint or sheet metal vendors can help you too. A little costly, ours has a $45 minimum, but very scratch resistant and durable-well worth it.
The rustoleum hammered finish paints are awesome!. Not only do they look good, they cover blemishes on old gear.
thanks everyone. Since I'm doing this strictly DIY I'll be experimenting. I may try to replicate an "accident" that I stumbled across when I was 15 (um, a long time ago). I was building a fiberglass boat. I bought paint for it and didn't realize the paint required turpentine thinner. I thinned it with mineral spirits which didn't mix, and the result when I went to spray it was similar to the affect I'm after (this was maybe the first of many times I learned it's good to read the label). Alas, I'll probably not have an easy time replicating my accident. I'll no doubt also try some of te suggestions made here. Thanks again . . .