Steering block 6221/6225 alternatives?

[XLR8]

Needing a replacement set for a runner car and they're out of stock everywhere I've looked.
Is there another alternate part - is it possible to use B3, B4 or perhaps some other model's blocks without modification?
Just looking for something in-line that fits, functions and doesn't cost a fortune.
If not then I guess I could carve a set from aluminum but rather have something in nylon and less labor intensive.

EDIT: Sorry, I think I should have posted this in the tech forum.

[discgolfer72]

I was at the lhs yesterday doing some part checking and it looks like the sct10 front hubs and steering blocks would fit (rc10t) , but you would need to change out the axle shafts also

[bluewormx]

I think the Losi JRX2 blocks are a direct fit, but you will need scr8p to confirm.

edit:

They are easier to find in black part # 6221

There are some on ebay.