Aye, a couple of them should do. With a reducing bush so one can be fitted in the 3/8" BSP port. E.g. :Is it this one?
Can you post a link to the connector needed to 3/8 pipe to the propane regulator. I spotted 2 very similar jg fittings one has a long thread and other has a shorter thread with a rubber seal on the shoulder.
I can’t get my Kegland 2 regulator 2 work. It’s reading the same as main reg on Co2 bottle when adjuster is screwed in.
Brass Male 3/8 x 1/4 BSP - Male x Female Reducing Bush Adapter Thread Reducer : Amazon.co.uk: Garden & Outdoors
Your Kegland regulators are showing the pressure in the keg, not the "set" pressure. No regulator would show set pressure although some "relieving" regulators (Kegland regulators are not "relieving" types) might show something closer after they've vented any what it sees as excess pressure. [EDIT2: Here's someone having the same issue with Kegland regulators: Kegland in line regulators Help needed].
@ceborame : It's a risk you are happy to take. It's not a risk I'd be happy to recommend to others. The extra kit* amounts to less than £20, a spoiled brew amounts to ... . And 30g of priming sugar per Corny is a hell of a lot! No wonder you get away with no extra CO2 gear. And no demand valve? I'm surprised you (usually) get away with that given the stupendous pressure the beer is under (from 30g of priming sugar).
[EDIT * Extra to the usual CO2 gear that is.]