Hi Scoutjockie,
Awesome to see another jedi in development
If i'm correct in assuming that you are referring to the boots sold by Robin? There are a couple of boots on his website that are quite often used by Legion members.
http://www.costumecreationsbyrobin.com.au/shoes
Click on the pic of each shoe to bring up it's number. Number 27 in particular is used very often, along with number 28. Again they are very much acceptable.
Boots are pretty flexible, just as long as they do not significantly look relatable to any other 'universe' or 'era', so for example no pirate boots, etc. A best way to be sure is to post pics of what you are looking at so other members can give you some feedback
Here are also the Legion guidelines on Boots for a generic jedi:
8. Boots: Brown or Black Boots – Leather or leather-like (no rubber boots).
a. Over-the-calf, but not above the knee.
b. No visible laces or outside zippers. When necessary, inside zippers are permitted.
c. Straps & shin-spats are allowed but not required (though can be used to cover laces and zippers).
d. Boots and belts should match (be of a complimentary color), i.e., black and black or brown and brown. No black/brown combinations.
e. Buckles are permitted, but should complement the boot and not detract from the overall look of the Jedi costume.
f. Low-heeled 1 – 1 1/2 inches maximum. Spike heels are not permitted.
Looking forward to how everything goes, and good luck