Soft cocoon for Mountain Buggy Duet?

[Jackie432]

I've just bought the MB Duet for my 19 month old and newborn due in a couple of months and have seen some posts that the Petite Star Zia cocoon fits the duet (I won't want to spend too much on a carrycot/cocoon) however I can't find anywhere that sells the cocoons? Does anyone know other cocoon/carrycots that are cheaper than the mountain buggy ones that would fit?

I got my Zia cocoon from eBay, as did a friend of mine. Just a case of keeping your eye out for one.
The bugaboo cocoon fits too but wouldn't be parent facing. The baby would be secure as the harness & buckles feed through the cocoon.
Same with the Phil & tends cocoon - and no way of securing this either.
I've heard that the Graco soft carrycot might fit, & have clips to secure it to the D-rings on the Duet: like this: www.ebay.co.uk/itm/GRACO-QUATRO-TOUR-DELUXE-SOFT-CARRYCOT-CARRY-COT-BLACK-GREY-IMMACULATE-/261418325359?pt=UK_Baby_Pushchair_Accessories_parts_ET&hash=item3cddbf156f

Could this work?

www.mothercare.com/Maclaren-Techno-XLR-Soft-Carrycot---Scarlet/Charcoal/434293,default,pd.html

If Petite Zia ones fit, then I assume the Graco soft cots will fit too.