Also try Simply Rugged. THose products are OUTSTANDING and IIRC, they make a slip over/under speedloader pouch as well. As well as similar speed strip holders and GREAT pancake triple slotted OWB's (my favorite).
Hope this helps but also consider searches on Ebay for older police equipment. You can find SafariLand, Bianchi, and others in slip over style at pretty reasonable pricing. Check the merchants there that specialize in that type of material. Lots of "Buy Now" action, when they are available.
Happy Easter.