What you could do is put up a square pole and install a 1,000W shoebox since an M-1000 is extremely difficult to find and ship. Maybe try searching around town to see if any 1,000W shoeboxes are still installed and, if possible, try to contact the owner and find out if they're willing to replace them or not.
If that's too difficult, I'd just put up an LED (a good quality fixture, avoid the eBay junk). You'd get better color rendering and probably better optical distribution, too.
This AEL Series ATBM, for example. It's inexpensive, has free shipping, quality components, and it's multi-tap, so it'll work on any voltage up to 277V.
With the M-1000, you'll need 480V in order for it to work efficiently. It'll use a lot of amps if it's anything under 277V.