Ayup there mate, i'm a plater ( working on Heathrow T4 extension at the moment ), why dont you have look round locally, say small firms that make gates, wall panels... engineering firms in general, for what you're after, it would probably just a small cash number, ( back pocket job ), take no time to knock up, i'm sure they would be grateful of such custom, giving time of year and financial climate. Regarding finish, you're bang on mate with the galve, 25 year guarantee, dont chip away like paint can, galve is done on weight, so what you're after should be with in reason. My own kennel panels