Pink Floyd concert DVDs

Howdy,

I've been searchig around on Tower Records, DVD Empire etc for two Pink Floyd Concerts on DVD--Pulse and The Delicate Sound of Thunder...no luck so far. I have these on laser disc, but alas, that player is not hooked up in the HT...it is a relic now...

Stumbled on a website that does have them listed as for sale, but am little leary of purchasing since if anybody had them available I'd have thought it woulda been where I've already looked...and the website where I found them looks a little suspicious (no phone #, address etc).

Does anyone know if these two concerts were ever released on DVD and some suggested sources to buy them?

Mitch