The base movement is an STD6. This base movement can be ordered from watch supply houses for about 13.50 USD. You could have someone just swap the autowinding mechanism. Unfortuantely the cost of repairing asian autos( which is mostly labor cost) can quickly approximate the cost of the watch, but in this case, if you have access to a watchmaker you should be able to get it done for maybe 50% of the cost of the watch, in my estimation.
Good luck.