Several items can be purchased at local dollar stores and craft stores, also, look in craft sections of large department stores.
On-line items such as bird toy making supplies also provide several items safe for suggies.
Here are some vendors that sell toy making supplies:
The Sugar Glider Store Spoonful of Sugar There are other vendors that may sell toy making parts,
sorry if I missed anyone, I went from the vendors list in Glider help under toy supplies. There are several listed that either no longer exist as a store. The two above links I have not ordered from personally, but the first one I see advertised on here periodically, so I know is still open. I will most likely order from there when I'm in the market for supplies again.
Warning:
One website that is listed under same category (I didn't link it here above) will still allow you to order, but there will be no contact or order fulfillment, once purchased through PayPal, you will need to file a dispute to get refunded. I believe someone else was able to get a refund, I never followed through. I've have recently tried to contact this vendor, as I had ordered from her in the past with no problem, I'm hoping all is well with her and to hear from her eventually.