05 Production Companies There are people and companies who will arrange for you to record a vocal demo in return for a fee.
You'll find them advertising in places like the Music Noticeboard at www.loot.com or on noticeboards in music shops. It'll say something like "we'll arrange and record a professional version of your song."
Remember that the only people checking the quality of their work are their customers so be careful about who you hire.
Some are great. Some will make you sound cheesy. Always ask for examples of their work and be objective about what they send you.
Play them to your friends and family. If they think it's really naff, go somewhere else - you're not obliged to hire the first one you talk to.
Check very carefully about what rights they ask for on the final recording - they may want a cut of any money you make in the future.
ALWAYS check with someone you can trust before you hand over any money. Never sign a contract without getting legal advice first.