Hi Chris - the problem with Blades is they are, well, not worth fixing unless you are a do-it-yourself sort of person. The cost to pay someone to do it is usually well more than they are worth when finished as they are all different and generally have unique problems built into them. (Plus paying others to work on a Blade will end up costing you more than the cost of buying a more reliable and parts-available older OEM EV). Additionally: even when going, Blades have far inferior range and EV tech than even an old iMiEV or Leaf. Old Leafs in particular are well supported by active communities, parts availability and dealers - plus Leafs themselves are well built and seem likely to last well into the future. If spending the sort of money to have someone work on a Blade - it is quite simply 'throwing good money after bad'. Even after fixing it, you will soon be up for the cost of a new battery pack anyway, as they are all getting quite old and were mostly all poorly battery managed.
I have heard of old Leafs needing new battery packs going for as low as $5k here. I'd suggest saving one of them from going to the tip!
Selling your Blade for parts to someone else with one who does their own work is a useful, non-wasteful end for it. They may even have a controller to fix it with! That in fact was my plan for an old long-range Blade I had here. My conversion van was reaching it's end-of-life, yet still had a good controller - and I had finally worked out how to match the controller to the AZD motor. Sadly Covid intervened and I had to sell the lot, plus my old Leaf, to stay afloat for 6 - 12 months of unemployment. (... ultimately including 6 months of being the full-time organiser of the many, many permutations of AEVA's 2020 EV Vision e-conference before it finally ran! ... but I digress

)
Hope that helps - good luck with your decision making.
Kind regards
Bryce