If its the modern hilux you have, the stock wheels are 1.9 rim size, so 2.2s will need rims aswell.
For good 1.9s which are easy to get hold of in the UK, take a look at;
http://modelsport.co.uk/?CallFunction=Manu...goryID=99701510 scroll down for the Pro-line 1.9s.
Otherwise I have ordered from http://www.sdi4x4.com/ they based in spain and sell some nice ones.
or you have options such as www.rc4wd.com and www.tcscrawlers.com in the USA.