Hi Ingo,
MED went out of business and their aircraft were de-registered with G-JMED being de-registered to Germany on 3/2/2016 so looks like it is now D-CFIL. My database shows that it went to Germany also but with no new registration details.
D-CFOR c/n 614 did as you state become D-CGFO. The former G-ZMED 35-656 was de-registered to Germany also on 3/2.
3CF307,D-CFIL,35-671,Learjet 35A,Air Alliance Express
3CCEB1,D-CFOR,35-656,Learjet 36A,Air Alliance Express
Many thanks
Alan