nice looking car. You didn’t have to change lower control arms to convert them, unless you just wanted refurbished ones ready to go.... you are right, sometimes rounding stuff up is a pain. When I do project like that I get everything I need prior to starting. When getting used spindles I always try to make sure they give you the dust shields, bolts and caliper brackets if they have them available. The rest can be bought new easily.
now that you’ve done the conversion you can get parts for them just about anywhere which is a huge plus.