Adding Winglets to older aircraft as an uopgrade

I know there was a lot of talk about getting upgrades to the plane as winglets or sharklets.  But it seems to have disapeared.  I really think this is a nice option that you dont need to order a new plane but upgrade the plane with winglets for the WINGLET price.

In reallive this also happens.  TUI just upgraded all there 757,767 and 737 to winglets, Easyjet is upgrading to Winglets (Sharklets or what ever they are called)  Even KLM has been upgrading the Transavia fleet with new winglets.

Martin or SK any ideas on this as an option for the future.

Mike

WINDS Australia (Templehof)

Well - the same like before - once the new airvraft configuration will be available this will be possible. But thwre is no date given yet.