Dan & I both have access to custom made covers, I ordered one a few weeks ago for my "rescue" boat ('88 Advance) the pattern still fits perfectly. A custom patterned cover is always a better fit, the question is cotton duck or newer synthetic materials like Sunbrella, then options like how you want to tie it down to the boat, ropes, straps etc.
MAKE SURE YOU AUTO-BILGE PUMP WORKS.