How exciting! I love Mahenge Spinels . What does your ideal Mahenge shade look like?
Here’s an option that doesn’t break the bank at Multicolour:
http://www.multicolour.com/detail/?-266416948
I bought mine from Sukrita at Prima/Aurelia Gems. I just told her what I was looking for and my budget and she pulled a couple of options for me. Here’s her Etsy store link (she has more available than what is listed): https://www.etsy.com/shop/AureliaGems?search_query=Mahenge+spinel
I like David Weinberg. Always honest. He sets some of my jewellery - mostly anything requiring melee. And does a good job most of the time.