Legendary interiors install question

I'm waiting on my set of covers, also from Legendary. I will
do them myself. I've done alot of covers on new cars. It's a
simple job if you take your time. Keep them warm. room temp.
If they get cold they are hard to pull over the foam.
I ordered mine about 2 weeks ago. They won't be shipped till
the middle of march.14-15th. Do they make each set as people
order them?