this huber suhner looks much neater without that panel mounting protrusion, but more than double the price... consider shipping cost from china which one is cheaper..
https://www.ebay.com/itm/HUBER-SUHNER-22645644-33BMA-SMA50-1-199-UE-New/122016004771?hash=item1c68b87aa3:g:-3UAAOSwM5JZplW0since you posted it, this is inside of LPA-BNC (i cant remember if i've posted it somewhere)...
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although my measurement setup can be questioned (due to difficulty to mate BNC converter to my N or SMA port connector during SOLT calibration and... the VNA used is not HP/Agilent) but fwiw, this is its S11 return loss and |Z|...
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the original LPA-BNC and the above LPA-SMA is solid metal end to end, quite hard finding the right material to diy, but i've made the pigtail type diy... BMA-BNC S11 return loss and |Z| (comparison with blue trace as control measurement, ie no diy-BMA adapter in between of coax cable (Huber-Suhner) and snapped together terminator+to BNC adapters.)...
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i dont have original LPA-SMA and am not intending to get one, $250 for just some plastics and metals is just wow, so i just get one LPA-BNC (which has extra 6 pins female interface at the front), just to see whats inside it, ie BMA/BNC adapter and the 6 pins connection, and to get the mechanical dimensions... they just both direct connection without any special component inside, yeah those all are for $250 the cheapest (used) i can find in ebay that time. btw this is diy BMA-SMA S11 return loss and |Z|. (i forgot to make control measurement)...
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the measurement was made feb last year. the BNC and SMA connectors used are from cheap China (direct connection/soldered to RG174 cable) but the BMA male (originally BMA-BMA pigtail cutted to half) and female-BMA to female-SMA adapter came all the way from USA, Tensolite brand, fwiw...