Bolt on kits are nice and cool and very uncommon as I have had one. But they do not hold up the best for hard riding. For that, you are better off finding a frame with a weld-on kit already installed. Make sure you check your welds as some kits were installed by very amateur welders and can be very dangerous. Good luck with your search. I don't know where a bolt on or weld on kit is currently, but I will try and keep an eye open. I've always had a soft spot for the aftermarket kits and frames. I've had a couple of bolt-on yamaha yt175 kits as well. Also there were aftermarket frames that were built for just the 185s engine, so you may want to keep an eye open for them as well. These kits will be a little more expensive but way more sturdier. Best of luck in your search. You live in a great area where these kits are a little more common out your way than here in the East Coast.
Nicholson 500x (Project)
Nicholson 185s
Nicholson 110 (That takes an atc70 tank)
Ascott 500 head/350x (Project)
Homebuilt Racer Chromoly Suspension 110 (Ragin Runt)
PK Racing Suspension 70
A+ Inc Suspension 70
AWS Aluminum 90 frame
Hi Performance ATC Suspension frame rd350
Hi Performance ATC Suspension frame 90