Many many sealants but present favourites are Gtechniq C2v3 and CarPro Reload, Gyeon Cure although they are not sealants in the strictest sense of the word, the are very easy to use and give excellent results.
Others include Nanolex, OptiSeal and the old favourite Fk1000
If your in the UK, yeah £3.5k should get you reasonable mk3 or early mk4 Hilux 2.4d, no chips for these babys though, you`ll need a mk5 d4d 2.5 for that.
Any good ?
http://www.ebay.com/itm/2-x-CV-Joints-Hilux-4x4-Petrol-Diesel-1979-97-Leaf-Spring-Front-Models-New-/121054460191?pt=AU_Car_Parts_Accessories&fits=Make%3AToyota%7CModel%3AHilux&hash=item1c2f68791f&vxp=mtr