Sounds like you want to repair with a new assembly. Rebuild kits appear to be available. You need to confirm which type of 035Ti you have, whether it is the "A" model, as Zilch points out above. Prices have gone up on both kits. Might be suggesting that supply is diminishing. Either way replacement domes are going to be around $100-130 depending upon the model. Go to the
www.jblpro.com site, under customer service, and explore the parts and service location threads. Alternatively, these units pop up on eBay regularly.
DavidF