I have been trying to find seeds for vegetable marrow. I can only fine spaghetti marrow and that is all stringy when you cook it where as the vegetable one can be cut into nice little chunks or stuffed, much nicer and taster .
Certified GKH Gardening Expert
Do a search for Marrow Squash seeds. There are many sources available for mail order.
You can also check Ebay and Etsy for seeds.