I don’t think the lifting of the nozzle would have anything to do with the lifting off the bed issue to be honest. But could be wrong.
Yes you can online find the same od and id tubing its really not that expensive. here is what i bought https://www.amazon.com/gp/product/B08S3QDLKS/ref=ppx_yo_dt_b_asin_title_o00_s01?ie=UTF8&th=1
Fits right into the feeder adapter on the print head.
Yes i have the enclosure, just drilled a hole in the top and printed an adapter to guide the two tubes through the hole i drilled.