Is there a custom fit cover for an 88' Invader V177 made by another manufactuer because they have a similar body lines?

I have the same boat. I went on iBoats and purchased a semi-custom. I've had it for 3 years and it looks like new. It's not cheap material so it's not cheap but affordable, fits like a glove and it's worth it. Just go to iboats.com and type in your boat info and you'll see what the search engine gets for you. Otherwise, find an local marine/auto upholestery company to fit a custom cover for you. It'll cost a pretty penny though.

Good Luck