Hi there, I noticed you are looking to source some yellow compound 4wd tyres.
May i point you in the direction of my for sale thread?
http://www.oople.com/forums/showthread.php?t=79710
I have a set of front 4wd minispikes in yellow compound (not listed on thread), as well as a few pairs of green minispikes front and rear.
Feel free to contact me if i can be of any help :-)