Simon is a 'mobile' mapper but spends a lot of time at Surrey Rolling Road (Chertsy), my engine was built by Williams Motorsport (WMS on scoobynet) he has a few engines listed on eBay and will take your old engine in exchange or rebuild yours:
http://stores.ebay.co.uk/wmsdeals4u
Best bet is to contact him direct and see what he can offer (Andy Williams) as you'll get a better deal than if you just buy a 'standard' rebuild/forged engine from him.
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2005 Spec B 6MT - KiDO tuned (~270Bhp)
Custom exhaust - Cosworth filter - Samco Intake - Tints - Bilstein B8/B6 & STI springs - SuperPro ALK - Whiteline positive shift kit, rack mounts, rear adjustable camber bushes, front ARB mounts & strut brace, 20mm rear ARB with AVO mounts, - Hardrace Gearbox and pitch mounts - Prodrive PFF7's - Front Brembos - Kenwood CarPlay - 1/2 carbon grille - STI front splitter