You need to supply a CAD file of the profile(s) you want cut. Search "hardox lasercutting" or similar into google, I'm sure you'll get something local enough that you could drop off the materials. Although they might prefer to use their own stock as it's a known quantity for them and using theirs might end up cheaper anyway (incl. costs of getting them your sheet etc). Ya need to send some emails with plans and get some quotes back blokey.