DE is useless as a wormer. You can find the wormers at a local feed store or online. You can call your local vet to see if they have an 18 french tube and a 60 ml catheter tipped syringe.
To put the tube in...Wrap her in a towel, firm but not too tight, and stick her between your legs. If you have a helper have them hold her so you can tube her. Then with one hand you open the beak. Start the tube on the left side and put it down the right side. You'll feel it go down to her crop. Do no go straight back that is her airway and it's nearly impossible to get a tube down there anyhow. Start with small amounts and work your way up.
How much does she weigh. Safeguard will be .5 ml per 2.2 lbs Not sure on the others. What do you feed her?