This reply may be a little late, but maybe not too late.
I think you should look at Slumberjack sleeping bags. I know that these are not on many people's radar, but the are very reasonable priced and reasonably light. Slumberjack has the Super Guide Thermolite Extreme 30 degree bag, only $50 at Campmor and 2 lbs 9 oz. Or there is the Ultimate 20 Thermolite Extreme for $60 and 3 lbs. I am sure you can find these on sale cheaper and/or get a discount for Scouts. By the way, my son used the Super Guide bag for his entire experience in Scouting (8 years to 18 years, Eagle Scout) including 2 trips to Philomnt and several 3 to 5 day trips outside Scouting. It has held up quite well.
Also, consider Eureka tents. They have a couple of lightweight models that are quite durable and all are priced very reasonably. I have owned 2 Eureka tents for at least 10 years, put many nights on them and they are still in excellent condition.
For backpacks, consider the Kelty packs and the GoLite packs. Both are reasonably priced. The Kelty packs are very durable and some are pretty light. GoLite has some light packs that can be found quite reasoably, even cheap. I got a 2 lb, 4,500 ci Pinnacle pack recently for $43. Hard to beat. This is a frameless pack and probably not what you want for Scouts, but it is an example of a good pack for a great price.
The advice about Alps Mountaineering equipment bought from their ScoutDirect site is excellent. They have great prices for solid equipment. Their tents are very competitive on weight if you get the right one. Their sleeping bags and packs ot so competitive on weight, but great prices.
Hope this helps and that you are making progress equipping your Scouts.