[RTTY] Confirming OLD QSO's

[ns5b at comcast.net]

Found these RTTY contacts in one of my old logs that I thought I had lost years ago, thus, none have been confirmed. I did upload them to LoTW, but didn't get any hits. I was wondering what the chances some of these can still be confirmed by paper QSL?  My call was KB5IBT at the time of these contacts. 

UZ9CWA     27-Nov-1989 04:42   20M   RTTY
FG5CI          20-Dec-1989 00:14   20M    RTTY
JE2UFF         28-Apr-1990 08:25   20M   RTTY
5W1HK        28-Apr-1990 06:03   20M   RTTY
TR8JLD        28-Apr-1990 05:37   20M    RTTY   
CT1BHX      02-Apr-1990 08:35   20M    RTTY
C31LHK      19-Feb-1990 15:29   15M    RTTY
D44BC         19-Feb-1990 01:30   20M    RTTY
I4LRH          04-Feb-1990 06:39   20M     RTTY
UO4OWQ    22-Apr-1990 04:10   20M   RTTY

Thanks,
Steve, NS5B 
(ex - KB5IBT)