all mods are brand and quality dependant. and every workshop has different pricing aswell, (if u cant do it yourself) so best way to find out costing for your exercise here is to do the ring around, and do some searching on the net. u will find alot of online sites, and also talk to the sponsers on this site see what they can do for you., as for labour, ring up a few work shops ask what there hourly rate would be. pretty simple stuff.