Hi Mike,
welcome to the forum! It's no problem to talk to you in your language.
It's easy to modify the Alp 200 and you'll find lots of interresting information around this topic here.
The Urban bench ist a regular Beta part you can order at your Beta dealer. It's shown in the Part Finder system Beta has created,
here ist an example for such a page.
There are two different colours available, black or red/black that I've choosen for my Alp 200 descibed
on this pages.
Regards
Werner