You can't get it out from the top unless you remove the engine first, lol.
Yeah, you lower the trans then unbolt the bellhousing bolts, with a hoist, its not that hard to do, but if you have a jack, a tranny jack or the tranny jack piece that goes on a trans jack and maybe a cherry picker, you can easily do it on your back, I used to do trans at home in my younger days,
Money can buy you anything, so yeah, if you want to build stronger stuff, then find a local trans shop or machine shop and they can design build but it won't be cheap.
Not that I know off. and really, there still isn't much A413 stuff available either.