I have a Losi rock crawler and the u-joint (that's what I would call it on my car) that connects the rear drive shaft to the transfer case has come apart (and gone missing somewhere in my backyard). I looked at the front drive shaft and it looks as though there is a pin that is pressed into place to hold the u-joint together. How can I fix this? Is this a part that most hobby/RC shops would have? Do I need specialized tools? Thanks for your help.

***If you look at the picture you should be able to see at the top left that the driveshaft end that has come out from the transfercase.

Thanks again.