Where do you source the smaller electrolytic capacitors during recap?Hi

Howdy all. I'm in the process of rounding up the goods to recap an old Pioneer SA-500A integrated amp. I'm running into troubles sourcing the smaller electrolytics as most of them have been replaced with surface mounts. I've stayed with Nichicon audio series for as much as I can but I'm having trouble finding the following in any brands: 2.2uF 25V, .47uF 25V, 22uF 2.5V, 3.3uF 25V, and 1uF 25V.
To those audio techs and hobbyists out there, what do you do when you can't get the appropriate caps? My options are to 1) leave the old ones in and not worry about it 2) substitute wiih a different type of cap such as surface mount, tantalum, or ceramic, or 3) subsitiute resistance or voltage values. The other consideration is one of cost. I'd like to order as much as I can from a single vendor. I've been looking at mouser, digikey, and allied. Even though the components are cheap the shipping is going to be prohibitite if I have to order from multiple vendors as they typically charge between 7.99-11.99 for the lightest possible orders. 
If anyone has a solution for me I'm all ears. Thanks!
You do realize, you can go up in your voltage ratings, right?      I shop with Mouser and Digikey, mostly for power supply, electrolytics.  For circuitry, these guys carry some nice caps :  https://www.partsconnexion.com/capacitors.html    and : https://www.parts-express.com/cat/capacitors/68
Digikey stocks all the nichicon audio grade non magnetic electrolytic capacitor lines, and all the regular Nichicon audio grade electrolytic lines. It's horrible to go there, $100, $200, $300 worth of capacitors, each time....
 1uF and less should be replaced with stacked film polypropylene. Depending on space, some of the others might best be replaced with PP caps. I suggest WIMA MKP. Mouser and DigiKey have them. Always go up in voltage.Higher voltage rated caps always behave better in low voltage applications and they're usually marginally more expensive.  
Thanks for the advice guys! I ended up going with higher voltage and I found everything I needed at Mouser and t he best part is only one shipping charge!