How about this for the relay side of things?

https://czh-labs.com/-p0198.html?gclid=Cj0KCQiAzKnjBRDPARIsAKxfTRAEdBVGf803UV1Gs99uRIiE2-Eg6pPYEpWFvF0pXhEaUpcJrIh014QaAjIQEALw_wcB

You could also stack a touchscreen on it. 

Sounds like you're on the right track. 

Cheers,

Tim B. 
Sent from my Huawei phone
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