You need to call Best Products (Pro-M / Pro-Flow / they have so many names!). They are located in Michigan, I think. I think their web address is
www.pro-flow.com
They have blow-thru meters for forced induction setups. They also have this new meter called the "Univer" that is supposed to be really, really good. Basically, it can take readings regardless of air turbulance (bent elbows, etc.). Also, I believe they make the Univer in blow-thru models as well. The blow-thru units have a lip on each end for better sealing. They have all kinds of sizes - just give them a call.
Hope this helps.
E