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Amazon has Monoprice HDMI Micro Male to HDMI Female port adapter for $ 1.99.
Free shipping with Prime or $ 25+ orders.
Amazon: https://amazon.com/dp/B004YXJWMG
This appears identical to Monoprice 7703 despite the slightly different part number. Monoprice has 7703 also for $ 1.99, with free shipping on $ 39+ orders.
Monoprice: https://www.monoprice.c
Typically $ 3.49-$ 3.99, which is 43-50% off regular price.
On Monoprice Q&A, this is a pin-to-pin adapter, so it should support 4k at 18 Gbps speed.