I remember doing them too, they were a piece of cake to do. They are still in use on the Vivaro so, I imagine just about everything else still has them.
I didn't say that you said that, I said that you can't do it. When I had a bulk tank, it was just outside my garden on a bit of a wilderness, I had to keep the area free from tall grass and weeds.
BTW, wind your neck in.
It used to be the case that other suppliers stipulate that you need to use a tank that they supply. If that's still the case, just build a new plinth a bit further away.