Iboats.com, Cabelas.com, attwoodmarine.com . Iboats has just about anything and everything you can think of. I believe Cabelas has a catalog, I'm sure there are others out there also.
I have a whole bunch of boating website links on my own website though, if I keep it up I'll have my own google search engine for boats and more lol.
ishopmarine.com has little pieces parts like individual o-rings & fasteners, etc. but the shipping cost eats ya up on small orders. westmarine.com is good for those with money coming out of the wahzoo.......
iboats, boater owners world, boatersworld, overtons. most offer the same thing, so shop price, iboats is the best for shipping cost, and customer service.
Equivalence becomes a fuzzy term. What part of the JC Whitney experience appeals to you. When it comes to automobiles you have three options. They can be fast, the can be reliable, and they can be cheap. Obviously they can not be all three or even two of those. My experience with a turbo Dodge Rampage has proven that many times over. The faster it goes the more it breaks and cost me more. When I opt for the reliable aspect of the equation, the speed drops. And, when I go for cheap, it is neither fast or reliable. In automotive applications, one can make various compromises, but when it comes to boating and more so in aviation - reliability is utmost. I doubt if you have a JC Whitney type company in the aviation world and you would probably never buy from one either. Boating is a very close second where reliability is concerned, the potential for catastrophic failure may be somewhat lessened but the utter humiliation of being towed back to the ramp is tantamount to having your onions nailed to the mast.
