G'day Jimmy,

They'll be too big unfortunately - the Jumbo was a King Single sized swag as opposed to a double.
It doesn't look like Oztrail sell the Jumbo poles anymore, but you could try getting in touch with them to see if there's any still in stock

G'day Sean,

I have just gone and measured each pole and the Foot Pole is 195-197cm the Middle Silver Pole is about 211-212cm and the Head Pole is 265-267cm long. They may be a few cm off but I think they're pretty close and could work!

G'day Trev,

I feel like High Country was an old Rays outdoors brand maybe?  Either way, we can't say if these will be a suitable replacement, sorry.
Check out the Mitchell Expedition Double Swag here, if it's a similar design to yours and the dimensions are roughly the same, I'd say your chances are pretty good.

G'day Mark,

I've just measured the head pole on the Mitchell Expedition Double swag and it is 267cm long.

G'day Will,

It's hard to say whether or not the Mitchell Expedition Double Pole Kit will fit your Glenrowan Double Swag. I've just done a quick google search and they look very similar. Your best bet would be to pop into the store with your swag and we can have a go to see if they'll fit. 

G'day Will,

We didn't get an exact answer as to whether these fit or not, I couldn't find any info on the Glenrowan Swag except a setup video, they look fairly similar in size and shape and these poles would be the closest replacement. If your swag is close in dimensions to the Mitchell Double Swag I reckon these will work although we can't say 100%.