air conditioinng

I'm in search of a low-side adapter to recharge my AC for my 1973 BMW. I've purchased several from Amazon but none fit. It measures 24 mm. Does anyone know an adapter source? Thanks

The time has come. This is a call to arms to all E9coupe members and the men who stand behind them, to harness the collective power and passion we have for the glory of the E9 and gear it, together, toward one last major offensive. To take our place in history. In years to come, future...