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Film is a very real possibility for you, especially with a 1K plate to do the heavy lifting. You could just do a 3 and 1um films and a piece of glass or marble tile. About 30 bucks for 20 sheets, 60...

I bought a very nice 1K diamond plate on Ebay (diamondtools30) from a place that sells diamond lapping plate. It is a bit thin, 1mm, but I put it on a wooded bridge over a piece of rubber drawer...