Only had my MK5 a week and I have badly damaged my front nearside 18" Monza wheel

caused by a large boulder jutting out of a grass verge,dont think its repairable.
Options are the Stealers are looking £450 for a genuine VW one

or a replica can be picked up for around £75.
Would a replica one cause any problems as to fitting,balance or tram lining etc?