Hi I did a quick google search "model yacht Ailsa" got the vintage model yacht group and there is a 30 inch loa Ailsa. Is this a larger version of your one? Do not think it is aluminium though.
I have restored a model yacht about your size and the economics are not good, better to DIY. I charged £120 for a complete re-build (new deck, the hull had come apart into 3 pieces and separated from the keel weight) and new sails, it did look nice though.
The only reason it was restored was that Grandad had made it.
I unveiled it on delivery and the father and son were gob smacked! So it was worth it! I suggested that they buy a cheap plastic yacht and sail that, and put grandad's yacht on display.
I think I was working for £3.00 per hour! You can spend the same amount of time on a yacht 3 times the size when it becomes more reasonable.
regards Roy