I have never used that combo? I use a 50% gly and water sometimes but generally use Garlon/Remedy/Relegate and dsl to basal bark spray small shrubs and trees. Check the labels on those herbicides for details.
By know most are aware of Keystone Pest Solutions as an online source for most of the herbicides we may need if you can not find it locally. They also often carry smaller quantities if you don't need a 2 1/2 gallon jug of something.
Keystone Pest Solutions
Search "Oust" on their site for instance and you'll find a generic alternative "Spyder" and if you can't find something give them a call and ask for help or encourage them to carry something you may need.
Rural King still has the lowest price on clethodim (for killing grasses in clovers and other broadleaf crops)
Rural King - Clethodim Source
In most cases your local ag co-op will order the herbicides you need but often they may require a 5 gallon case order...check with them first but as with the clethodim, sometimes an online order, even with shipping is less expensive.
ePestSolutions is another online source that carries a huge array of herbicides including Panoramic (for NWSG) with free shipping so check and compare before you order...