Innan jag stälde frågan på detta forum frågade jag Sabre support ( trots at jag inte är resebyråagent ) men fick svar i morse.
Skall gå att konvertera Amadeus till Sabre om man har agent id och "ordering rights" tolkar jag det som:
""I have received a reply from Second Line of our Support. They wrote that transformation request can be done online in Agency Eservices (it's a special platfrom used by all Sabre Travel Agencies), by filling a PNR DataMerge from Amadeus to Sabre.
In this case, as you do not have access to Agency Eservices, it's recommendable that someone from the agency where booking was done with Ordering rights on Eservices will place the order and request the merge.
It can be also done, by contacting Amadeus representative in order to ask them their version of the PNR transformation form.
I wish I could help you more.""
kanske kan vara bra att veta för den som har mer "trämgade" behov än mitt.