That altitude could be better used nibbling at the stall and demonstrating several prompt recoveries when the wing drops.
I didn't have time to post earlier, but if I had, I would have posted something along these lines as well.
The OP wrote "...any recommendations as to where else I could go for this training or indeed suggestions of how to overcome my concern of stalling?"
I think it's a bad idea, from the outset, of trying to overcome a concern about stalling. Instead, I think it's best to keep a healthy dose of respect for the stall. Because that's what will keep you alive.
I'm an aerobatics pilot and stall and spin regularly. But I have never overcome, and will not try to overcome, my concern about stalling. I only stall or spin the aircraft as a deliberate act, when the aircraft is within all the Aerobatics Category limitations, and after having done the HASELL checks.
In any other flight regime, stalling is something to be avoided. There is no benefit to be gained from stalling an aircraft, and at low level it may be deadly. And spinning is even worse. So I'm alert to any signs of a stall, and correct promptly.
By all means do an introduction to aerobatics course. Learn what an aircraft is really capable of. It's great fun and will improve your skills to no end, regardless of whether you do it in a powered aircraft or in a glider. But keep in mind that in almost all flight regimes stalling is something to be avoided at all costs. It therefore makes a lot more sense to train incipient stall recognition and avoidance, than stall/spin recovery.
It's OK to lose a mortal fear of stalling and spinning. But do keep a healthy dose of concern.