I do believe that it's Luke's helmet in that collection. Do they say it's Han's in the book? When this particular hero bucket popped up on the FISD site, I did some comparisons to screen grabs and it looked a LOT more like Luke's helmet than Han's. For instance, Han has a high brow (which admittedly can be changed) and 7 stripes in the left tear. Both the yellowed hero helmet in this collection and Luke's have 8 stripes in the left tear.
Luke on the left and Han at the bottom...yellow helmet in between:
View attachment 684168
This pic shows that the second stripe on the left tear has a wide paddle-like base on both Luke's and the yellow helmet:
View attachment 684167