If you keep it then order one of the big service manuals first, easily found on ebay.
The top can be replaced by a dedicated company, a few options from cloth to canvas are still available. I would budget about $1500-$2k depending on material. StayFast canvas being at the higher end of things.
Hard parts can be sourced from junkyards but the seals and weather stripping are hard to come by. I`d advise you to treat them with the right silicon rubber conditioner ASAP whether you keep it or not.
What engine does it have in it and how many miles? the 3100s are a bit easier to maintain just due to fact its doesnt have a timing belt like the DOHC 3.4 does.