Jamison might be old and a bad defender but he still would be a way better backup PF than Blair and Bonner.
Spurs could offer a good enough package to do a S&T for Jamison.
Blair+Neal+Byars+Joseph+$1.1M in cash for Jamison sounds good.
Blair and Neal are 2 fine young player. The $1.M in cash is to paid Joseph salary. Byars can be cut for free. With this package, Spurs could sign Jamison to a $10M/2 years contract. After that move, amnesty Bonner to stay below the tax.