Is there any particular type of contract that you are looking for? We've done some custom contracts for smaller purchases, however when it comes to the purchase of large equipment, we generally are happy making small modifications to the vendor's contract.
On other items, there are several standard clauses that we put in that I stole from the TDCAA paper on Contracts that is available for download in this forum. Most of them deal with indemnity, escape clauses for non-funding by the commissioner's court and the like.
Robert DuBoise