"Piggy Back" Fuse available for Glass Fuse?

I would like to know if a company manufactures (or anyone clever has fabricated) a way to piggyback onto an old style glass fuse? I just want to tap into the instrument/dash panel illumination so that my aftermarket oil pressure gauge can be read after dark. I just don't like splicing into factory wiring harness if I don't have to. It would be cool if I could just clip something over one end of the dash light fuse that is there in the fuse block. Thank you.

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