Links and resources for the cornet and trumpet player

http://www.practicesightreading.com/
This website has a great free tool for practicing your rhythms.  If you find yourself getting lost during rehearsal or just want to test your skills, this is a great tool

http://thetrumpetshop.wordpress.com/2010/01/26/trumpet-intonation-sound-and-timbre/
An interesting blog post about intonation and trumpets

http://abel.hive.no/trumpet/clarke/bio/
The full text of "How I became a cornetist" by Herbert Clarke.  Clarke wrote famous methods still in use today and is arguably the greatest cornet player of all time.

http://www.musichem.com/articles/trmp_car_for_students.htm
A guide on how to clean a trumpet.  Your trumpet should be cleaned regularly, don't let anyone tell you otherwise.  Always take your time, you don't want to accidentally damage your instrument. At a minimum clean your trumpet thoroughly three times per year if you play every day.  If play less frequently or rarely, still clean at least once per year and re-grease all the slides, otherwise they may corrode and get stuck.  Trumpets with tighter valve tolerances may need to be cleaned more often to avoid sticky valves.

Research sites for particular brands (a useful resource for learning about a cornet or trumpet that you found)
Olds Central
The Besson Loyalist
The Holton Loyalist
The Bach Loyalist
The Schilke Loyalist
The Conn Loyalist

Trumpetherald post of online sources of new and used trumpets
Because I recognize that I may not carry the trumpet or cornet that you are looking for and I also respect the work of others who sell quality used instruments, here is a link to a page showing other folks who sell quality new and used trumpets and cornets.