Benders are sized for EMT; the rigid and IMC that they bend is one size smaller.
So, you would need a 1-1/4 bender to even fit the pipe in the shoe.
I'd order the 46's and splice them in. For one piece and two bends, this is easily the cheapest way.
Otherwise, United Rentals has entered the electrical equipment rental market.
A larger contractor might be willing to bend the pipe, for a fee.
I've often made SMALL bends using a Harbor Freight hydraulic bender. Bending a 45 in IMC ought to be just barely possible. It's time consuming, and you're likely to scrap some pieces before you get it right.
The old 'return trick?' Personally, I consider it to be dishonest. Most supply houses won't play along in any case, with 'no tool return' policies posted.