Hello and thanks for looking

I have been trying  (for years) to get an autograph from James Marcus who played Georgie in Stanley Kubrick's A Clockwork Orange.  The following is more info than is needed but I just want to make it clear I'm a sincere fan and appreciate any help or guidance you may have.

I have been a fan of the film (and book) when I unearthed a copy of the VHS in my Dads collection ages ago. Shortly there after I went to great lengths to make a costume resembling one of the "Droogs".  I actually met Malcolm McDowell while in costume at a 2008 Rock & Shock horror show convention in 2008 in MA.  I started collecting posters and other movie memorabilia including  autographs.   I obtained several from Mr. McDowell including 2 when I met him in person.  From there I thought it would be fantastic if I could get ALL the droogs.  On ebay I was able to find Warren Clarke (Dim) and Michal Tarn (Pete) from reputable dealers and members of the UACC.  James Marcus however was nowhere to be found.  I began to research him and found very little (certainly no autographs).  I reached out to UACC and they provided me with a business address he used to be associated with.  From there I purchased British postage stamps (to place on a self addressed return envelope) and constructed a personal letter to him.  I even made it a point to watch several other films he was in so I could reference them in my letter.  I sent that letter out over 2 years ago with no response.  A few months ago I researched the company  that I was provided by UACC and found another address that was explicitly tried to Mr. Marcus when he was the acting director. https://beta.companieshouse.gov.uk/officers/A_YlzitVi8cWJy3LeMFZriq... I sent another letter to that address (with return postage/envelope included) the better part of a year ago with no response.....

So with all that said, can anyone give me any leads or resources I can use to try to get an auto them from the last remaining Droog?

Thanks 

Matt