Extracting A Portion Of A String In SQL Server 2005

Hello, this seems simple but I've been banging my head a while.

I have a data field that is formated like this: NYT/2000-Subways/7510-Electronics Mtc/7540-Data Svcs.

I need to pull out the string after the second / and before the third / in this case the value is 7510-Electronics Mtc but it does change.

I have this function that returns the first value (NYT):

USE [Data_Warehouse]
GO
/****** Object: UserDefinedFunction [dbo].[Get_Dept] Script Date: 04/22/2008 09:22:49 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO

-- Provide the phrase before (ex. 'Worklog Related to'), the field searched (ex. UPDATE_ACTION), and
-- the phrase after (ex. ']').
-- This function returns the string found after any phrase and before any phrase, within any field searched.

ALTER FUNCTION [dbo].[Get_Dept](@in_Phrase_Before varchar(250),@in_Search_Field varchar(250))
RETURNS varchar(250)
AS
BEGIN
Declare @str_String As varchar(250)
Declare @tmp_String as varchar(250)
Set @str_String = null -- to clear the variable buffer

Set @in_Phrase_Before=char(37)+(LTrim(Rtrim(@in_Phrase_Before)))+char(37) -- if 'Null', all strings will be returned

If Left(@in_Search_Field,4) = 'NYT/'
BEGIN
Set @tmp_String = Right(@in_Search_Field,(len(@in_Search_Field) - 4 ) )
Set @in_Search_Field = @tmp_String
END

If (PatIndex(@in_Phrase_Before, @in_Search_Field)) > 0 --Checks to see if the phrase before is in the search field
Set @str_String=SubString(@in_Search_Field,1, (PatIndex(@in_Phrase_Before, @in_Search_Field)-1) )

RETURN @str_String

END

Thanks in advance for the help