Gius... do you have a link or pics of what you're looking at. I have not heard of HELD, i'll have to go look them up. I'm 6'6" and tipping the scale at 240, I always have to get Tall/Long due to my 37" sleeve and 36" inseam. There is a lot of great safety gear out there but like you, i too have found very little "Big/Tall/Long" that really fit properly.
I did find an incredible 4 season jacket with removable liners from FLY "HydroGuard" and a couple of large vents that really work nicely. I bought it back in May of this year and have used it many times before breaking out my mesh jacket for hot summer riding. I used the FLY while i was down in Moab/LaSal Utah where it got up into the mid 80's. Like many other jackets, as long as you were moving it was great. But the fit/feel is incredible in the FLY jacket. The sleeves are plenty long, there is plenty of room i the chest and across the back and it is plenty long in the back to cover you backside properly. I can tell you with certainty, when this jacket wears out i will buy the same one again!! Fly Racing Street Terra Trek Jacket - RevZilla
For pants i found two that work really nice.
1- is an XL/Long from Wicked Stock and they are 4 season with removable liners with several vents that also work really nice. I used these while i was in the sweltering Moab area.
2-Klim Teton pants. They do not have any vents causing them to be pretty warm but still fairly nice. They are surprisingly comfortable and a great fit in length 36/Tall-Long.
(Here's a picture for you to get a great laugh. Picture me making a traffic stop and then watching me unfold myself from the patrol car getting out, then doning my Smokey Bear hat and walking up hahaha!)