---this link is to a guy named Dave Koehler
https://www.koehlerinjection.com/enderle-fuel-injection-nozzles-jets.html---he shows Enderle nozzle 2 piece bodies---maybe they have to be soldered together
---or maybe he has some other stuff
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---I have used some crimp on hose clamps like Oetiker to surround the nozzles and crimp'm on there to basically seal off those air holes
---and I have also made circular pieces that fit on with a press fit----that have connections that I can run to a common air source manifold---like to get the ram air or boost air pressure into all the nozzles
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---this is a long shot but there's a guy in Australia named Ken Lowe who does fuel injection
http://www.kenlowe.com.au/---might want to e-mail him and see what happens