I can’t seem to find any but you can k6-2 450 for like $20-30 US mbaha
“Build your own you will love it more”
I have a K6-3+ 450 just siting in my spare parts box. I ordered it for my Dad, but it wouldn't work properly in his motherboard so I put his K6-2 back in. I tried to return it but with no luck. If your interesed in buying it e-mail me.