Unless you are willing to import from USA, or buy second hand it's unlikely you will get a ready made set to fit. I'm looking at options for my 4600 but they all mean getting them templated and made locally.
Prices do vary quite a bit so check around and choose a supplier who has a good name, people in the local marina or local forums should be able to help with suppliers. Covers, and technology, have developed over the years so you should be able to get some improvements incorporated.
Good luck.
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