I Just bought a pair of Beowox RL45.2 speakers for 40€ which seems to be a nice price.

But you don't get everything for that price. The Fabric is in bad shape and need to be replaced. I have organised some new and have read the guide on http://members.aol.com/beophile/rl60demo1.html .

But what kind of adhesive do I have to use for this operation?

Unfortunatly the brushed mylar strips and the built in floor stand is missing on both speakers  Does anyone know if it is possible to get any of these spare parts or maybe someone has it from a broken speaker?

One last thing. Does anyone know if it is possible to get a wall moun for these speakers or do I have to make something up myself?

madskp:

Unfortunatly the brushed mylar strips and the built in floor stand is missing on both speakers  Does anyone know if it is possible to get any of these spare parts or maybe someone has it from a broken speaker?

One last thing. Does anyone know if it is possible to get a wall moun for these speakers or do I have to make something up myself?

Don't know about the mylar strips, but the floor stand is just a square loop of thick steel wire. Unless the fixing part is missing, it shouldn't be too hard to make yourself, certainly if you can borrow one from somewhere to use as a model.

Wall mounts certainly exist. I think they are the same for all RLs, except the small RL35 and the two big ones, 140 and 7000. 

If you want to make them yourself, take a look at the RL service manuals on site. They have pictures of the floor / ceiling stands which may be useful as ideas.