Just throw money
Re spin recovery, although it wasn't much use for teaching aeros, the T67a was great for teaching manoeuvre stall recovery, decent stall training and basic spin training.
But I was once doing the 'low steady airspeed, high rate of rotation, high descent rate' patter to a student - only to see him gazing fixedly at the left wingtip! In all the spin training I'd ever done, I'd never come across anyone who didn't look straight ahead in the spin!