Hi Doug,
Have a look at Brian Lawson's wills index at: www.iomfhs.im/lawsons/LawsonBMD/wills/quayl-will.html?Submit=Quail+%2F+Quayle+etc.
The columns show Name, Year, Parish, Alias [maiden name], Reg, Ref, Film [LDS film number] so you can look for possible wills for your family for Maughold and Lezayre. Some already have transcripts attached.
You can use the wills list in conjunction with BL's burial index at:
www.iomfhs.im/lawsons/LawsonBMD/burials/quayle_1.html?Submit=+%5B+Quayle+%5D+
If you find a burial date for a relative, you can then look to see whether he/she left a will, and then order the film number given there.
It is also a good idea to check the wills on Ian Radcliffe's website where there are a lot of recent transcripts, in case one of the Quayle wills of interest has already been transcribed. At: lawsonsiom.freevar.com/
As well as looking at the "Recently Transcribed Wills" there, look at the buttons just above which list the transcripts which have been previously contributed in three-monthly sections.
Sue