I hiked Rinjani but not with this agency. If you would like details, I can share the agency I used. Also, we have collected shoes for the porters and guides, as they are in major need of equipment in this small town. See our site here:
The problem now is that shipping rates are exorbitant and we are looking for trekkers who would volunteer to check a box or two as their luggage to deliver to these people. We would pay the baggage fees and would post your photos of the delivery on our site if you would like to help with this charity event. The shoes and athletic apparel is currently in Michigan but could be sent to you if you are in the US. The boxes are not big and weigh 23 lbs each.
Thank you for considering completing this donation!