Do you have any plume trees? Are they self polinated

Do you diagnose plants as in telling what are wrong what disease they have?

I am going to guess you meant "plum" as in the fruit-bearing tree. There were some young plums when i was last there, though I don't recall the cultivar or variety. You should instead call them directly to see what they have currently in the way of plums; they may also be able to order some for you. Very few cultivars are self-pollinating so you should consider getting two varieties to ensure proper cross-pollination.