Been gathering 'stuff' for a oven PID. Got most of it from Evil-bay and an on-line electronics place.
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Still not pleased with housing but everything fits...sort of.
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First Pic: you can see it on and operational
should note this turned out to be a Cº PID--no problems; quick Google check and 400º F = 205º C. Turns out 208ºC is what I need to get 400ºF at the center of the oven (excuse the blurry pic--I'm old and have the tremors.
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Pic Two: Look at 'guts' of PID. Got PID and SSR in package deal off E-bay.
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Pic Three: front view with top off; was able to drill side of oven so TC would screw in
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Pic Four: front view with top on. The SSR on its heat sink sits a bit proud of the case. Will put a plexigas cover over it; will mount with stand-offs so there is air movement.