That is the Volvo Special. It is sold with hoses for a special price around $110, part No. 1270480. I am thinking you may just be able to get a check valve, part No. 1275226, but it is listed for the S/V40 2000-2004. Looks the same, but I don't know more than that. Any other part numbers on the chec...

Saw this on ebay https://www.ebay.com/itm/Volvo-EVAPORAT ... Swc1Beg4cN a bit less.

Check valve in Volvo assembly 30757307 (Evap System Hose Assembly) . The assembly is ~$110.00. The best and probably the only way to get just the check valve is a salvage yard or JB Plastic Weld the one you have back together. https://www.fcpeuro.com/public/assets/products/260530/large/data.?1496495...

Cleverly, while replacing rotted hoses in our 2005 XC90 2.5T, I snapped the end off what I presume is a check valve on one of the 9.5mm manifold vacuum hoses(?) https://lh3.googleusercontent.com/tuIVY9tTV9v-43DJlXjf_3FX12eQZp6_ffez_tLmNIDWN3yAmQvITMYNFtkjw4cwg1lfJqdOQhanm5gmizx5iRdaKJX6JaQwpODtI_dg...

Yes that goes below your intake manifold to the evaporated solenoid.