Well, I just saw that Linde Armstrong in a 18" cleome, so they do exist. Should have done a little research first. :-)

First, I would start a new thread that addresses "looking for citrus rootstock"; you might get a lot more responses. Second, be sure you understand what rootstock you want; as in dwarfing rootstock will give you another dwarf orange, while standard rootstocks will give you a standard size tree. Also dwarf rootstocks tend to grow slower and take longer to make fruit.

Hi Val1! I just sent an email to the last two addresses I have for you. If you don't get the email, please message me your email via Houzz. I prefer emailing to private messaging. I have some MDB if you don't already have them...or maybe they are now some of your no id ones. I remember we had a nice trade or two so many years ago. My email addy is the same as it has always been, in case you might have me in your address book. Sue

Plants can be amazingly resilient; do give these a chance. If leaves are badly damaged, as in your fifth photo, go ahead and remove and destroy (don't compost) them, as they probably don't have enough chlorophyll-containing tissue to contribute to the upkeep of the plant. However, there is no need to remove the leaves if they still have a lot of undamaged tissue - just squish the borers inside the tunnels in the leaves; you might even be able to see them if you look closely. I know, yuk, but it's them or your zukes! Besides, that's what garden gloves are for, and they're inside the leaves anyway. I trust you made drainage holes in the bottom of that bucket; if not, you need to do that now. Be careful with the Epsom salt; don't over-do. The only yellowing I see in your photos is on heavily infested leaves, and may be a by-product of that infestation. On another social media site, someone shared a site with multiple charts illustrating how plants exhibit nutrient deficiencies. I'm posting it below in case Prof. Google hasn't already shared this one with you. (By the way, I've not had a chance tor review this yet myself.) http://bigpictureagriculture.blogspot.com/2015/12/plant-nutrient-deficiency-leaf.html Looking forward to more photos and wishing you the best of luck ... I've not even planted my zuke seeds yet! Heeled in some tomato plants in that spot and they appear to have taken over.