Splendid Parts is reproducing those items and OGTS is stocking them. So you just need to buy from OGTS. The 2.4 oil pan was different and wouldn’t fit in a GT, so I imagine you have a 1.9 steel pan. I believe you need to remove a plug from the engine block on the 2.4 to use the in-block oil dip stick. The engine block had an internal tube.
Thanks Zeppi. I ordered the dipstick and its tube from OGTS and do have a 1.9 steel pan. I spoke to Gill about the oil pickup tube. If nobody has one to sell I’ll have to modify one to fit and make a bracket.