Step Up Transformer housing case -- available?


I see that some places sell bare step up transformers without the case unit. Then, with some housing units, people can assemble and build a complete SUT?

How hard it is to build a complete SUT? Is it a very delicate process since the signal level is so low and sensitive?
Do they sell those housing units with holes drilled for bare transformers and RCA jacks?
128x128ihcho
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Link to below of a sut project I just completed. Lots of photos. This may help to give you some idea on at least one way to proceed.
http://www.theanalogdept.com/bd_sut.htm

-Steve
Many thanks for your input and detailed pictures. I guess I can follow the steps without too much difficulty.