cost effective.... ?
1 ) dumpster dive for steel and make your own, lots of designs/dimensions on the web. depending on your skill level and tools, it can be made in less than a day. free is 'cost effective'
2 ) buy a 'kit' of the 'end latches', add bracing steel, done in a morning. maybe $100 ??
3 ) trade in your bucket for a KUB 'kit'. 100s$ I suppose..