I just emailed*
a parts order to Crosman and found that the Disco hammer spring part number has changed. It was 2261-009, it is now 2261A009.
Also the piercing pin/disc used on several different Crosman models as well as in the Pro-Top valve conversion has changed. It was 38A027, it is now T4-041. This I had already read somewhere and it was confirmed by Crosman*
The change in part numbers did not delay the order- 'Sally' simply made note of it in the confirmation email sent to me ~ 10 minutes after I emailed the order. This order was for more than 30 different part numbers so it was impractical to sit on the phone and read out each one. So email works just fine for me but YMMV.