exhaust trims for my A4 2.0 TDI 170

BUSTER A4 MISANO

07 A4 AVANT 2.0TDI SE 170. MISANO RED.SAT NAV.GSM
Does anyone know the best and cheapest place to by 2 chrome exhaust trims for my new A4 2.0 TDI 170 SLINE SPECIAL EDITION. The two exhaust mesure 80mm. Do I need streight or angled trims.
Thank you
 
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