Yarn sub suggestions?

[LEFT]A blanket pattern I want to make calls for Classic Elite Montera. I was hoping to make it with Swish Superwash. The problem is that Montera is a heavy worsted and Swish isn’t. I really want to make it in a washable wool so I was hoping someone had a good (reasonably priced) suggestion for me.
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well maybe since it comes in dk weight, use two strands together bc i think used the worsted with two strands might be too thick

I am currently knitting an item, and using elann luxury merino superwash. It comes in DK weight. I’m using it doubled, and knitting garter stitch. I’m getting 17x34=4 inches on size 7 needles. Depending on how you knit, you may get something close to this. I don’t knit tightly. Hope this helps.