I first answer your most dire question. Yes, Akrapovic, Arrow, Leo Vince, etc)provide Switzerland-legal exhausts!
For an exhaust to be legal, either one of the following must be true:
a) It is an exact replacement of the original.
b) It is listed on the motorcycles type approval.
c) It has a Swiss type approval.
d) It has a EC / ECE type approval, and has a Certificate issued by a Swiss importer or producer.
e) It has a EC / ECE type approval and you can show the full version of it (some 10 to 20 pages)
f) It was specifically tested on your bike and you can show the test results from a approved testing site.
f) gives you the most freedom but is the most expensive option.
d) Is the standard option. You either buy in Switzerland (expensive) or buy aboard and get a certificate from a Swiss dealer. Other forum members may help with this. See for ex: Having issues finding importers for motorbike exhaust.
Most information can be found in (No Italian or Englisch version)
KT MB 11 «Austauschschall-dämpfer und -katalysatoren» (German)
http://www.asa.ch/media/archive1/Sho...MB_KT_11_d.pdf
or in French: http://www.asa.ch/media/archive1/Sho...MB_KT_11_f.pdf
Here the rest of the legal Mumbo Jumbo (in German)
Weisungen des ASTRA vom 29.09.1995
Erläuterungen und Weisungen zu VTS, VVV und VZV
http://www.astra2.admin.ch/media/pdf...9-29_710_d.pdf
Weisungen des EJPD vom 29.09.95
http://www.astra2.admin.ch/media/pdf...9-29_710_d.pdf
ASTRA Weisungen über die Befreiung von der Typengenehmigung
http://www.astra2.admin.ch/media/pdf...-27_2418_d.pdf
Verordnung über die technischen Anforderungen an Strassenfahrzeuge. VTS
http://www.admin.ch/opc/de/classifie...165/index.html
Verordnung über technische Anforderungen an Motorräder, Leicht-, Klein- und dreirädrige Motorfahrzeuge. TAFV3
http://www.admin.ch/opc/de/classifie...170/index.html
Directive 97/24/EG
http://eur-lex.europa.eu/legal-conte...LEX:31997L0024
and Annex 2 of Council Directive 78/1015/EWG
http://eur-lex.europa.eu/legal-conte...LEX:31978L1015
ECE-R 59
http://www.unece.org/trans/main/wp29/wp29regs41-60.html
ECE-R 92
http://www.unece.org/trans/main/wp29...egs81-100.html