Altrec has some on sale.
I carry an REI Revelcloud vest for summer day hiking CYA insulation, but I use a windshirt too. I have a Power Stretch fleece vest that can fill the same slot if used with the windshirt and is brewer for rainy weather with the added breathability and moisture transfer. The fleece vest is 8oz in XL size.
The Revelcloud vest is 9oz in size large. It uses PrimaLoft Eco 60g insulation with a Pertex Quantum shell. To get more of an apples and apples comparison, what size is your 7oz Blaze vest? Other than that, it would have to be shell fabric, zippers and features like pockets and drawstrings to make up the 2oz difference in weight. Assuming that the shell fabric is lighter, I wonder how the Blaze compares for breathability?
I still think fleece wins on versatility for mid layer cool weather insulation over the 60g insulated/shelled jackets and vests. Fleece is heavier and bulkier, but the breathability is so much better and it makes a better layering system with windshirts and rain shells. The shells on the insulated garments just duplicate the windshirt layer IMHO.
My focus for cool weather insulation is 40-55F, high humidity and rain. If it is colder, 100g insulation is worth the weight and bulk and the 60g garments just don't deliver enough protection.