I know you have these:
https://www.amazon.com/GARITANE-Silicon-Shockproof-Transparent-Premium/dp/B07QBH19GG/ref=mp_s_a_1_11?keywords=HTC%2Bu11%2Btransparent%2Brugged&qid=1567878912&s=gateway&sr=8-11&th=1&psc=1
But never seen those kind of cases