Gas block help

Got a problem. Building a 300 BLK pistol and noticed the barrel has the gas port drilled .295" off the barrel shoulder. The block I have the gas port is drilled .295" off the front of the block. Does anyone know of any .750" gas blocks that have the port drilled .295" off the back face with a corresponding roll pin hole? I re-drilled the pin hole on mine and drilled all the way through the gas tube hole, flipped it around, but would like a cleaner looking option without all the extra holes. Thanks for the help.

So the .295" from the back face of the block would be the correct dimension? All the pictures of the gas blocks I've seen look just like the block I have where the gas port is in the front half of the block. Mine needs to be in the back half.

As to brand, I couldn't tell you. It's not marked and I built the thing from a collection of parts from someone who abandoned the project with only half the parts to complete the build. I took another look and it must be that it was thrown in a jig backwards? I'm guessing they drill the gas tube hole last and the new guy put it in the wrong orientation. Your guess is as good as mine. I have a new block on order. As to the straight pull part, I wouldn't be so opposed to that because I'm going to use it for deer in Illinois as a pistol. But being a self ejecting single shot pistol is better.