I just looked this up in the EPC for you. Assuming it's the one for the power steering, it's Toyota part #44350-28011. The bad news is it was only used on Toyota vans and the Hilux, but the not so bad news is it was used on every van from 84 - 89. The really bad news is they think it's worth $293.93
. If available, some of those discount Toyota parts sites would sell for around $220, but IMO a part like this over $75 means "unavailable". I think your best bet is to find a used one somewhere. Salvage yards will sell parts like this for ~$15. Even if it has a bad bearing, these can be had on eBay for ~$5.