I would look for stuff that are oddballs of him made by the Oiler's. You could probably find some easy and then get them autographed down the road. Here a few examples of stuff I have.



Then signed:



This could be easily signed and I am sure Robbie had some made before:



Probably could get something like this in a fanpack request if your truly wrote a nice letter:



A oddball team stop sign:



Another team issue:



Another team issue:



Could get a NHL draft program for him to sign the year he was drafted (make it a project):



Something like this would be more expensive but is a true collectable for a PC ITEM when it signed (even if not):