I prepared a short laboratory class for college students on carnivorous plants last year and it was well-received. I am looking at improving it by looking for prepared slides of a cross section of a venus fly trap (with one of the trigger hairs), and of Aldrovanda leaves (whole mount). Does anyone know where to buy these or I am too wishful?

If you have prepared these slides before for your classes, I would love to hear from you how did you prepare them. I might invest time to make the slides.

Many thanks in advance for any help.