There are a number of good glider feeding plans that you might choose from. HPW (actually there are many different ones) and BML are just some of many options.
I have links on my web page to a number of good feeding plans that you might want to consider. My own GliderKids Staple recipes and feeding plan is one of the options.
http://www.gliderkids-diet.com/Staple-Recipes.html
All of the ingredients for BML can be purchased at the grocery store except the RepCal Herpivite vitamins and RepCal Calcium which can be found in the reptile department of most pet stores.
If you choose the Original HPW or one of my recipes that call for Wombaroo High Protein Supplement it can be ordered here:
http://www.thepamperedglider.com/supplements.htm
She also sells bee pollen if the recipe you choose calls for it. Bee Pollen can also be purchased at many organic or health food grocery stores near the locally produced Honey.
If you choose one of my GliderKids Staple recipes - the Now Brand Calcium Carbonate can also be bought at many health food stores that carry vitamins. It is also available here if you want to order online:
http://www.luckyvitamin.com/p-881-now-foods-calcium-carbonate-powder-12-oz
Look over the various feeding plans and ask questions if you need help choosing one you want to use for your gliders.