Does anybody have an alternative to T-Slot Aluminum?

T-Slot Aluminium Extrusion Profile

We supply 40 x 40 ITM Aluminium Extrusion at a maximum length of 6000 mm With a 8mm T slot Manufactured by KJN Aluminium profiles

aluminium t slot track A short tutorial on how to cost-effectively connect T Slot Aluminium Extrusions to create a strong

aluminium extrusion t slot I used aluminium extrusion 2020 for the robot frame that I designed together with Basti Kuhz