Below - Werner has one that can help with the length part.
As to your price range, add a voice to no. Under $100 you are just being unkind to your joints unless you look used. I would add two ideas that I don't see above - EBay for used, and consider getting a paddle that is a little long and sending it back to the manufacturer to be shortened. If it is from a major manufacturer and is in decent shape, they'll all do it. The cumulative price tag is more than you state above but a lot less than a new few hundred dollar really light paddle.
Classic Freestanding Rack
Electric Kayak Motor
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