G'day Hayden,

These should work with this swag you may just need to shorten them a little. The Darche Dusk to Dawn Composite Swag Pole Set 1400 size is another option that would be a closer fit.

G'day Yarran,

Its hard to say without trying it in real life - I'd probably be more inclined to recommend the Darche composite swag poles in the 1400 size - they're basically bomb proof and super flexible without too much stress if the fit isn't 100% perfect... aluminium poles tend to have stress point and be prone to breaking if the tension isn't perfect.
Hope that helps.

G'day Rob,

This pole set is suitable for double swags only and doesn't have the flex or curvature suitable for a single swag - which 890mm falls into - even if its cut down.

Darche's Dusk till Dawn 900 swag composite pole set will probably be the best alternative for you.

Hope that helps. 

G'day Ashley,

We've not tried this in person, however, Oztrail say these are compatible with swags up to 150cm wide which is a category the Mitchell Expedition Double falls into.
There is also Mitchell specific poles sets available here if you are wanting a set of original poles.