Mod_ReWrite / ReWriteMap a URL using a database lookup script

Question

The Scenario
I have completely rewritten an old existing ASP classic ecommerce website over to PHP.

The database design of the previous site had

Answer 1

After finding out RewriteMap is disabled by my host, I've reached my own solution simply using mod_rewrite and 2x 301 redirects.

.htaccess file

RewriteEngine on
RewriteRule ^Product(.*)\.asp SEO_Redirect.php [NC,R=301]

SEO_Redirect.php file

$ID = $_GET['ID'];

$query_rsNewID = "SELECT NewProductID FROM Products WHERE OldProductID = '$ID'";
$rsNewID = mysql_query($query_rsNewID, $Database);
$row_rsNewID = mysql_fetch_assoc($rsNewID);

header ('HTTP/1.1 301 Moved Permanently');
header ('Location: Product.php?ID='.$row_rsNewID['NewProductID']);

Note, this is a simplified excerpt of each file, and would not be secure against SQL injection.

Hopefully Google and alike will accept getting 2x 301 redirects without problems.