2nite

Hi all, I'm new to the whole "own your boat" scene. I recently picked (over 1 month now) up a vickers 4.7m runabout and it looks alright. However I have yet to put it in the water because of the damn trailer! I tried to take it out at mooney mooney 2 Saturdays ago, remember that hot stinking one? Anyway the trailer wheel popped and I was on the side of the road for most of the day. When I arrived to the Hawkesbury river, I forgot to bring my winch!! Total waste of a day. Anyway, to the main issue. I now have a 2000 model brooker trailer which needs new tires. Apparently the stock standards are 10" but this trailer had 12" and I'm having issues sourcing them. I have to order them. So in order to save future hassle I've decided to just upgrade the whole thing to 13" hubs which seem to be industry standard. I've tried to contact a referral for mobile trailer mechanics, but this guy hasn't responded so he can get screwed. I'm hoping someone here may have the time to teach me (I will pay you for your time) or know of someone who can come around and do this for me.. I've googled the hell out of changing hubs, bearings, etc and fairly confident I can do it, but having an experienced person around would be better seeing how this is my first attempt. The boat is located in Bossley park ( Fairfield - Liverpool region)