How many times have you found a supplier who makes "almost" what you need? By the time you go through the hoops to make it "exactly" what you need, sometimes it's easier to build it.
time!
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By the way, there are four ways to get 625 ohms using standard EIA-96 (1% or better) values in series:
475+150, 523+102, 324+301, and 316+309.
Also, 16.9K in parallel with 649 gets you pretty close.
(I got tired of doing this stuff by hand a long time ago, and wrote some utility programs to find the best series, parallel, and ratio values.)
