There doesnt appear to be anyone monitoring this site here anymore unfort for us. However, if you look closely at the Beswick part, I think it can be made by cobbling Mccarr Master parts 2844K75 and 2844K12 together. Some drilling and tapping required. I'm not yet sure, but thats what I'm gonna try. The other way for sure to get it done is use a couple of plastic T-barb fittings (amazon) to split up the static source to feed the four sensors that require it, but thats a bit messy wrt hose routings. Still, I think theres enough room in the box to get it done that way as long as you dont kink the hoses.

Could I buy one of these from you guys too please? Not exactly sure how to contact you directly....