I have a 42 cup West Bend coffee urn and lost the instruction book telling me how much coffee per cup to use. Do you know where I can get another booklet

Best to contact West Bend for clarification: http://westbend.com/support/contact-us.html

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

Your model sounds like the West Bend 59055 - Large Coffee Urn, 60 Cup.
The User Manual for your coffer urn can be found here:

http://www.westbend.com/supportdata/L5613B_LargeCapacityUrns-All.pdf

Instruction for making coffee can be found on page 5. For 55 cups is would take 3 1/4 cups of coffee.

Use an electric perc or regular grind coffee; if you grind your own this should be a medium to coarse grind.

Do not use 'drip' or finely ground coffee as this could plug the drain holes in the basket and cause the urn to flood.

Water level: Amount of coffee:

42 cups 2 1/2 cups
36 cups 2 cups
30 cups 1 3/4 cups
24 cups 1 1/2 cups
22 cups 1 1/2 cups
18 cups 1 1/4 cups
12 cups 1 cup

You can download the manual for your West Bend coffee maker from this page:
http://www.focuselectrics.com/catalog.cfm?dest=itempg&itemid=30&secid=54&linkon=category&linkid=62

ask them they have it

Weak coffee is 2 tsp per cup strong coffee is 3 tsp or 1 Tbls per cup. (3 tsp per Tblsp) 32 Tablespoons = 2 Cups, there are 4 Tblsp per 1/4 cup. If you're confused ( I am from reading my answer) Use 1 cup for weak coffee, two cups for strong or 1 & 1/2 for regular strength coffee. Hope that helps!

1 1/2 cups of coffee grounds for 30 cups of water

Might try
http://www.abtecparts.com/westbend_urns_misc.htm
or
http://www.coffee-urn-store.com/products.asp?cat=103

http://www.abtecparts.com/westbend_urns_misc.htm

It's a percolator. Use about 1 heaping teaspoon of coffee per cup. Each coffee pot is different. You will have to adjust the amount of coffee for what you like.