hull needed

[thething84]

i am just in the process of purchasing a nice turbo fan. see this link (http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&rd=1&item=5967794379&ssPageName=STRK:MEWA:IT) And i saw it and thought it was perfect for an airboat. i have built one but its only a small one. not much too it. the one i purchasing has a 3 inch diametre prop. thought it would be perfect. but need a hull to suit it.
any idea's. thanks