Wanted: Red / Gray Label 2600 carts with no dust cover or full-slot cover

I'm looking for Red and Gray/Silver label Atari 2600 cartridges that have either no sliding dust cover mechanism, or have a sliding dust cover that has a full slot.  Here are two photos to help you identify these styles:

No dust cover:



Sliding dust cover with full-length slot:



I'll pay $1.00 each in store credit for these carts, and I'll also cover shipping.  

Thanks,

..Al