Inline heater for a whirlpool bathtub

Are there generic inline heaters for whirlpool tubs that migh be cheaper than the ones offered by the tub manufacturer? Jacuzzi wants almost $400 for their RapidHeat, for example.
TIA
Ed
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A google search here:
http://www.google.ca/search?hl=en&q=in-line+heater&meta Brought up 214,000 possibilities...Hope that was of some help....Jim

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A google search here:
http://www.google.ca/search?hl=en&q=in-line+heater&meta Brought up 214,000 possibilities...Hope that was of some help....Jim

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
<%-name%>
Add image file
Upload

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