Good to have you aboard! VSA was in Ida Bay a year or so ago. We also did Mystery Creek and Wolf Hole, great caves. Keep an eye on the calendar as I am posting a heap of trips soon, if you’d like to do some Vic caving.
As for your lights, Oldhams are getting more and more rare these days and I couldn’t really advise you on where to fix one. There is a fellow named Laurie Brown from another club who used to put Oldhams together for us, but Im not sure as to whether he is still doing that or not. I will email him and let you know.