Are you in Aberdeen, SCOTLAND ???
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That style of tent with a metal pipe frame is quite common here in my Central Florida area.
Car detailers and flea markets use them in all sizes.
Wall tent angle kits kits are used to make sturdy tent internal metal frames. Purchasing a wall tent angle kit and making a tent frame from steel conduit available in any hardware store is the most economical approach to purchasing a tent frame.
www.walltentshop.com