Tmax hardware Sourcing?

[50m3one]

I hate plastics.  For multiple reasons.  Most of all, the nylon rivets, the spring clips, and u clips.

To that end - does anyone here know the appropriate sizes and types of clips used for the Tmax 500?  Any sourcing that's non-OEM? 

I'm losing spring clips left and right as they become lose on the two side panels with the yamaha logos.  They're just not that tight anymore.  I'm missing at least one, but probably more than that and can't find these on parts dealers' websites and explo diagrams.  U-clips are also coming lose here and there, but I don't think I've lost any yet.

I'd love to not have to not have to pay OEM prices for something if I don't have to, so having appropriate sizing for all of these would be awesome.  I've gotten a few nylon rivet kits, but none have had the right sizes.

Also - any sourcing on those weird bolts with rubber grommets (crankcase covers and chain cover) that isn't OEM and ~15-20 bucks each?  They tend to get stripped easily and I'd love to have a surplus of these on hand, but OEM pricing makes that difficult.  I know that they require a #2 philips and best practice is to use an impact screwdriver, but they're still finicky.  I've bought a couple after destroying one of them, but hard to stomach such a high price for a fastener.  

For reference to OEM part numbers:

Nut spring (u-clip): 90183-05042-00
Nylon Rivet: 90269-06008-00
Weird bolt: 3KJ-15481-00-00
Spring clip: ?

[FrankenMech]

Try a scooter parts distributor. There are many listed in the 'Reviews' section. The 'Coupons&Discounts' section may help also.

[aeroxbud]

The nut springs are readily available on ebay. It's used on loads of automotive applications. I have brought loads over the years for different bikes. Just measure the part you have.
The bolt is going to be a OEM replacement only.
The rivet is also something that is easy to find on eBay. It's just a regular automotive part used on millions of vehicles nowadays. It's a part that is easily broken, so loads of cheaper options available.
Your local auto store might even have them in stock if you take one in for comparison.