The following scan contains excerpts of R Yaakov Emden's Iggeres Purim published by Dr. Jacob J. Schacter in Studies of Medieval Jewish History Vol. 2. The style of this work is very similar to that of Megillas Sefer and confirms (not that this is necessary) some of the accounts in Megilas Sefer that the author of MP finds so impossible such as his attack on Knesses Yecheskel (which can be found in Sheilas Yaavetz as well). Dr. Schacter mentions that another excerpt of IP was published by A. Bick "in hopelessly garbled fashion" in Kiryat Sefer V. 50. The KS excerpt also parallel MS as it talk about RYE's illness and "most intimate sexual feelings". I have not yet seen the KS myself and would greatly appreciate if someone can send me a pdf.